Air lock for dust collectors



No. 613,266. Patented Nov. 1, I898.

L. GOLD.

AIR LUCK FOR DUST COLLECTORS.

(Application filed Mar. 28, 1898.) (No Model.) 3 Sheets $heet l.

No. 6|3,266. Patented Nov. l, I898.

L. GOLD. AIR LOOK FOR DUST COLLECTORS.

(Application filed Mar. 28, 1898.)

(No Model.)

3 Sheets-Sheet 2.

Eg s. 3,

In U8 71%01 Wzlfitesa e s i1 NORRXSFETEESLDJ PHOYO-UTHO" WASH No. 6I3,266. Patented Nov. l, I898. L. sou].

AIR LOCK FOB-DUST COLLECTORS. I

(Application filed-Mar. 2B, 1898.) (No Model.) 3 Sheets-Shani 3.

'74 L'fiwss es: lnven/'ora inan Gold 12 lflm.

m: NORRIS mans ca, mam-L ma, wnsmnm'bw 0.9

UNITED STATES PATENT OFFICE.

LYMAN GOLD, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO THE NORDYKE & MARMON COMPANY, OF SAME PLACE.

AIR-LOCK FOR DUST-COLLECTORS.

SPECIFICATION forming part of Letters Patent No. 613,266, dated November 1, 1898.

Application filed March 28, 1898.

To all whom it may concern:

Be it known that I, LYMAN GOLD, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful Improvements in Air-Locks for Dust-Collectors, of which the following is a specification.

This invention relates to improvements in air-locks for the conveyers of dust-collectors, and is specially applicable to the variety of dust-collectors which form the subject-matter of certain Letters Patent granted to Daniel WV. Marmon and others, of which Patent No. 586,742, dated July 20, 1897, is an example; and the object of the invention is to provide more eifective means for automatically discharging the dust from the conveyer without providing an outlet through said conveyer for the air, which is drawn into the dustchamber and is discharged through the cloth straining-tubes leading from the top of the dust-chamber and which without the air-lock would discharge through the conveyer.

I accomplish the objects of the invention by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a view in perspective of a machine embodying my improvements; Fig. 2, a detail, partially in side elevation and partially in central vertical section, of the lower part of the machine; Fig. 3, a horizontal sectional view through the dust-chamber as seen from the dotted line 3 3 of Fig. 2; Fig. 4, a vertical section on the dotted line 4 40f Fig. 3; Fig. 5, a detail in vertical section of the discharge end of the conveyer, showing the valve in its open or discharging position in full lines and in its closed position in dotted lines; Fig. 6, a transverse section on the line 6 6 of Fig. 5; Fig. 7, an under side view of a modified construction of a discharging-valve, showing the valve in its closed position in full lines and in its open position in dotted lines; and Fig. 8, a transverse section on the line 6 6 of Fig. 7.

Similar letters of reference indicate like parts throughout the several views of the drawings.

I have shown a dust-collector in the drawings in order that the application and opera- Serial No. 675,434. (No model.)

tion of my invention may be seen at once; but it will only be necessary to briefly describe that part of the mechanism which is old, after which my improvements will be fully described and the novel features thereof pointed out in the claims.

The parts marked A represent the frame of the dust-collecting machine, and thepart B at the lower end is a dust-chamber, into which, through the opening B, the dust-laden air is admitted.

O are cloth dust-collecting tubes which communicate with the interior of the chamber B. These tubes act as strainers, which permit the air to escape, while retaining the dust, which latter drops down into the dust chamber. To facilitate the dropping, a hammer O delivers blows against the supports for the upper ends of the tubes.

D is a central vertical shaft which is driven 7o rotarily and intermittently from the main driving-shaft E by indirect connecting means which need not be here described, and secured to the lower end of the shaft D, within the dust-chamber B, is a sweep F, which operates in the usual and well-known manner to sweep the dust deposited on the floor of the dustchamber around and cause it to fall through an opening provided in the floor. This opening is shown at b and opens-into a conveyer G, by which the dust is driven out of the machine.

The conveyer G is of an ordinary and wellknown form except as to the mechanism for maintaining the air-lock and automatically opening and closing the orifice for discharging the dust, which constitutes this invention. The conveyer is located below the floor of the dust-chamber and receives the dust therefrom and conveys it out of the mao chine. The conveyer is driven bya sprocket chain or belt H from any suitable shaft of the machine, (here shown as the main shaft The shaft E is driven by a belt E from any suitable source of power. (Not shown.) 5

Referring to the conveyer G, the letter I designates the case or box which contains the operative mechanism. It has the bearingsleeves 11 through its ends, in which the longitudinal shaft G is mounted. The spiral G roe secured to the shaft and revolving with it, conveys the dust from the inlet Z) to the outlet J through the bottom of the box. Fastened to the inside walls of the box are the guides I and 1 near the top and bottom, respectively, of the box, and K K are plates which rest against the side walls of the box and slide between the guides.

K is a plunger which stands transversely of the box and is held in that position by the plates to which it is fastened. This plunger fits the interior of the box and stands normally at the end of the spiral and in position to close the way to the outlet J, as shown by the dotted lines in Fig. 5. The shaft G passes through a suitable opening in the plungerhead, and surrounding the shaft is a spiral spring L, which presses the plunger-head eonstantly into the position to close the outlet. Sockets and 7c, respectively, are formed in the end of the bearing-sleeve i and in the enlargement to receive the ends of the spring.

The top guides I are cut away to form the shoulders m, which form stops to regulate the backward movement of the plunger. Slots S are formed through the sides of the conveyerbox, and bolts R are projected through these slots and form outside handles, by which the plunger can be reciprocated by hand in case it should become clogged to such an extent as to stick fast and moved enough to loosen the operative parts.

In the modification shown in Figs. '7 and 8 N represents the plunger, and N guide-rods which are fastened to the plunger at one of their ends and slide through openings in the partitions O of the box. The plunger is shaped to fit the arched metal hood P, the shape of which latter keeps the dust from packing and sticking fast, as it would do with a squarecornered receptacle.

The action of my invention is as follows: The dust deposited in the conveyer-box is carried by the revolving spirals to the discharge end of the box, where it is arrested by the spring-pressed plunger-head and accumulates in suflicient quantities to form an airlock. Finally the packing of the dust creates a pressure which overcomes the resistance of the spring and forcing the plunger-head back allows the dust to discharge through the outlet thereby opened. The spring immediately returns the plunger-head to close the outlet as soon as the excess of dust has been discharged.

Having thus fully described my invention, what I claim as new, and wish to secure by Letters Patent of the United States, is

1. In a dust-collector, the combination with the dust-collecting tubes, a dust-collecting chamber below said tubes having an opening through its bottom, and a sweep traveling over the bottom of said chamber, of a conveyer communicating with the chamber through said bottom opening for the purpose of receiving the dust from the chamber and conveying it out of the machine, said eonveyer having a discharge-opening, a plunger to close the discharge-opening, a pair of parallel guides to direct the plunger and prevent its swinging movement and a spring to hold the plunger in position of closure and impart to it a yielding resistance, substantially as specified.

2. In a dust-collector, the combination with a conveyer to carry the dust away from the machine, a horizontally-reciprocating head to stop the discharge of dust from the conveyer at certain positions of the head, a spring to hold the head in a normal position of closure and provide a yielding resistance to the head, and a pair of guides to direct the reciprocating movement of the head, and prevent rotary or swinging movement, all substantially as described and specified.

3. In a dust-collector, the combination with a horizontal conveyer to carry the dust away from the machine, a plunger-head to stop the discharge of dust from the conveyer at certain positions of the head, a spring to hold the head in a normal position of closure and provide a yielding resistance to the head and a pair of guide-rods connected with opposite sides of the head and supported by the conveyer-box and extending outside thereof to form handles whereby a hand movement may be imparted to the head, substantially as described and for the purposes specified.

4. In a dust-collector, the combination with the dust-chamber having an opening through the bottom, a horizontal conveyer-box communicating with the bottom opening of the dust-chamber and having an under side discharge-opening, a revoluble conveyer-screw mounted longitudinally of the conveyer-box in sleeves the one at the discharge end of the box having an inside socket, a plunger-head having an opening through which the screwshaft is projected with a socket around said opening, a spiral spring around the shaft with ends seated in the two above-mentioned sockets, and one or more rods secured to the plunger-heads and projected outside through the end of the conveyer-box to serve the double purpose of handle and guide for the plunger, substantially as specified.

In witness whereof I have hereunto set my hand and seal, at Indianapolis, Indiana, this 12th day of March, A. D. 1898.

LYMAN GOLD. [L.

Witnesses:

JOSEPH A. MINTURN, CARL SCI-ILEGEL. 

